Drag or transform creates unwanted duplicate of object
Moving any object (text, image, etc) with either the Move tool or Direct Selection tool creates a duplicate without having any other keys pressed (eg, option/alt).
Also when repositioning an object with Properties > Transform it also creates a duplicate of the object.
Mac OS 10.14.4
Clearing Prefs and restarting the computer resolved the issue.
Adobe InDesign team
I'm not sure if whether deleting Prefs or changing my Mouse made a difference but it would appear that I can now use the Move tool without issue.
I am getting a similar issue but I am also experiencing a problem whereby when I select a text frame with either the Move or Direct Selection tool it invokes the text tool. This can be very frustrating as it doesn't always happen. I have a large catalogue which requires the removal of prices featured in a text box plus the update (position and colour of SKUs). Due to the data merge approach I need to select one at a time each text frame. I might get to the 8th one and it invokes the text tool. Which means I need to start again, hoping that it doesn't repeat the issue. It's almost as though the tool is too sensitive - anyway I can make it less sensitive?